Hemiodontichthys
| Hemiodontichthys acipenserinus | |
|---|---|
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Not evaluated (IUCN 3.1)
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| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Siluriformes |
| Family: | Loricariidae |
| Subfamily: | Loricariinae |
| Tribe: | Loricariini |
| Genus: |
Hemicodontichthys Bleeker, 1862 |
| Species: | H. acipenserinus |
| Binomial name | |
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Hemiodontichthys acipenserinus (Kner, 1853) |
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Hemiodontichthys acipenserinus is the only species of the monotypic genus Hemiodontichthys, a genus of the family Loricariidae of catfish (order Siluriformes).
This taxon is often compared with the morphologically similar Reganella depressa; Hemiodontichthys has been considered the sister genus of Reganella on the basis of osteological data. However, the similar external morphology of these two taxa could be interpreted as an evolutionary convergence, as they occupy the same ecological niche. In both, there is a rostrum and the loss of maxillary teeth; these could have evolved independently in different lineages subjected to similar environmental constraints. Considering some of the morphological characteristics of the two species, Hemiodontichthys is now believed to be part of the Loricariichthys group, while Reganella is part of the Pseudohemiodon group.
H. acipenserinus is native to the countries of Bolivia, Brazil, French Guiana, Guyana and Peru where it occurs in the Amazon, Essequibo, Oyapock, and Paraguay River basins.
H. acipenserinus reaches a length of 13.4 centimetres (5.3 in) SL. It has been reported that populations from the Amazonian region tend to be more slender than those from the Paraguay and Guaporé Rivers.
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Wikipedia